May I remind you that double/triple posting isn't tolerated unless separated by 24 hours (Use the edit button)

You just make a store. There are no options to make a store and do this automatically. We really can't tell you how to do this all as some of the options aren't possible for users to do unless the admin does it.

You can just make a shop or a topic for selling this, member who wants signature will reply to the topic and you add them to the group that have access to the signatures and then you just take the points from them

@Gangstar15 wrote:You can just make a shop or a topic for selling this, member who wants signature will reply to the topic and you add them to the group that have access to the signatures and then you just take the points from them